NAME

       createablunaryexpr - creates an unary operator expression.

SYNOPSYS

       #include "abl101.h"
       chain_list ∗createablunaryexpr( Oper, Expr )
         long        Oper;
         chain_list ∗Expr;

PARAMETERS

       Oper                The unary operator number.

       Expr                Expression.

DESCRIPTION

       createablunaryexpr  creates  the unary operator expression Operator Expr. createablbinexpr
       combines eventualy the operator of  Expr  with  Operator.   The  expression  pointer  Expr
       MUSTN'T be used after the call to this function.

RETURN VALUE

       createablunaryexpr returns a pointer to the new operator expression.

ERRORS

       "ablcreate: bad operator xx !",
              Operator must be defined and must be a unary operator.

EXAMPLE

       #include "abl101.h"
          chain_list ∗ExprA;
          chain_list ∗ExprB;
          chain_list ∗ExprAorB;
          chain_list ∗ExprAnorB;
          ExprA = createablatom( "a" );
          ExprB = createablatom( "b" );
          ExprAorB  = createablbinexpr( ABL_OR, ExprA, ExprB );
          ExprAnorB = createablunaryexpr( ABL_NOT, ExprAorB );

SEE ALSO

       abl(1)   createablatom(3),   createabloper(3),  createablnotexpr(3),  createablbinexpr(3),
       createablxorbinexpr(3), addablhexpr(3), addablqexpr(3).